Pièce d'horlogerie
January 16, 1953
This patent was registered in the United States on June 16, 1953 as US2641899 with an additional figure and claim.
CH285850A
A Reference Library for Watches from Grail Watch
A Reference Library for Watches from Grail Watch
This patent was registered in the United States on June 16, 1953 as US2641899 with an additional figure and claim.